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Global Competitiveness in Pharmaceuticals: A European Perspective

Gambardella, Alfonso; Orsenigo, Luigi; Pammolli, Fabio - Volkswirtschaftliche Fakultät, … - 2000

European countries. As a whole, Europe is lagging behind in its ability to generate, organise, and sustain innovation processes … position of the US as a locus of innovation in pharmaceuticals has increased over the past decade compared to Europe. All in …

Persistent link: https://www.econbiz.de/10005034968

The Nature and the Extent of the Market for Technology in Biopharmaceuticals

Arora, Ashish; Gambardella, Alfonso; Pammolli, Fabio; … - Volkswirtschaftliche Fakultät, … - 2000

the 1990s. This enabled us to characterise several features of the innovation process in pharmaceuticals, particularly the …

Persistent link: https://www.econbiz.de/10005034980

Preferential attachment and growth dynamics in complex systems

Yamasaki, Kazuko; Matia, Kaushik; Buldyrev, Sergey V.; … - Volkswirtschaftliche Fakultät, … - 2004

Complex systems can be characterized by classes of equivalency of their elements defined according to system specific rules. We propose a generalized preferential attachment model to describe the class size distribution. The model postulates preferential growth of the existing classes and the...

Persistent link: https://www.econbiz.de/10005031401

The Growth of Business Firms: Theoretical Framework and Empirical Evidence

Fu, Dongfeng; Pammolli, Fabio; Buldyrev, Sergey V.; … - Volkswirtschaftliche Fakultät, … - 2005

We introduce a model of proportional growth to explain the distribution of business firm growth rates. The model predicts that it is exponential in the central part and depicts an asymptotic power-law behavior in the tails with an exponent ζ = 3. Because of data limitations, previous studies in...

Persistent link: https://www.econbiz.de/10005031404

Betweenness Centrality of Fractal and Non-Fractal Scale-Free Model Networks and Tests on Real Networks

Kitsak, Maksim; Havlin, Shlomo; Paul, Gerald; … - Volkswirtschaftliche Fakultät, … - 2007

We study the betweenness centrality of fractal and non-fractal scale-free network models as well as real networks. We show that the correlation between degree and betweenness centrality C of nodes is much weaker in fractal network models compared to non-fractal models. We also show that nodes of...

Persistent link: https://www.econbiz.de/10005031411

A Generalized Preferential Attachment Model for Business Firms Growth Rates: I. Empirical Evidence

Pammolli, Fabio; Fu, Dongfeng; Buldyrev, Sergey V.; … - Volkswirtschaftliche Fakultät, … - 2006

We introduce a model of proportional growth to explain the distribution P(g) of business firm growth rates. The model predicts that P(g) is Laplace in the central part and depicts an asymptotic power-law behavior in the tails with an exponent ζ = 3. Because of data limitations, previous studies...

Persistent link: https://www.econbiz.de/10005034991

A Generalized Preferential Attachment Model for Business Firms Growth Rates: II. Mathematical Treatment

Buldyrev, Sergey V.; Pammolli, Fabio; Riccaboni, Massimo; … - Volkswirtschaftliche Fakultät, … - 2006

We present a preferential attachment growth model to obtain the distribution P(K) of number of units K in the classes which may represent business firms or other socio-economic entities. We found that P(K) is described in its central part by a power law with an exponent φ = 2+b/(1−b) which...

Persistent link: https://www.econbiz.de/10005035004

A Breath of Fresh Air? Firm types, scale, scope and selection effects in drug development

Arora, Ashish; Gambardella, Alfonso; Magazzini, Laura; … - Volkswirtschaftliche Fakultät, … - 2007

This paper measures differences in the innovation performance of different types of firms in the pharmaceutical … industry. We compare the innovation performance of incumbent firms with entrants, controlling for differences in the scale and … to succeed as internal developed projects, inconsistent with the “lemons” hypothesis; d) firm scale improves innovation …

Persistent link: https://www.econbiz.de/10005061689

On Size and Growth of Business Firms

De Fabritiis, Gianni; Riccaboni, Massimo; Pammolli, Fabio - Volkswirtschaftliche Fakultät, … - 2003

We study size and growth distributions of products and business firms in the context of a given industry. Firm size growth is analyzed in terms of two basic mechanisms, i.e. the increase of the number of new elementary business units and their size growth. We find a power-law relationship...

Persistent link: https://www.econbiz.de/10005020505

On Firm Growth in Networks

Riccaboni, Massimo; Pammolli, Fabio - Volkswirtschaftliche Fakultät, … - 2001

This paper is explorative in nature. Based on an empirical analysis of two different industrial settings (life sciences, LS; information and communication technologies, ICT), it investigates network growth and firm growth in networks. We find a remarkable correspondence between a few fundamental...

Persistent link: https://www.econbiz.de/10005034974